View-changing device for magic lanterns.



J. KELLER.

APPLICATION IILED MAY Patented Mar. 9, 1909.

Z'SHEETS-SHEET 1.

J. KELLER. VIEW CHANGING DEVICE FOR MAGIC LANTERNS.

APPLIOATION FILED MAY 4, 1907. 914,728.

' BEETS-SHEET z.

Patented Mar. '9, 1909. I

JEREMIAH KELLER, OF CANTON, OHIO.

VIEW-CHANGING- DEVICE FOR MAGIC LANTERNS.

Specification of Letters Patent.

Patented March 9, 1909.

Application filed May 4, 1907. Serial No. 371,816.

To all whom it may concern:

Be it known that I, JEREMIAH KELLER, a citizen of the United States,residing at Oanton, in the county of Stark and State of Ohio, haveinvented certain new and useful Imrovements in View-Changing Devices forl agic Lanterns; and I do hereby declare that the following is a full,clear, and exact description of the same, reference being had to theaccom anying drawing, making a part of this speci 'cation, and to thefigures of reference marked thereon, in which- Figure 1 is a perspectiveview showing parts broken away. Fig. 2 is a top view of the picturemoving bracket, showing the lens casing in section and the picturecarrying flanges in section. Fig. 3 is a detached view of the disk, itsoperating handle and the shutter blades. Fig. 4 is a perspective view ofthe carrying plate showing the handle and stop springs, also showing thetension spring properly connected. Fig. 5 is a detached view of theshutter disk showing the shutters in a diiferent position from thatshown in Fig. 3. Fig. 6 is a detached view of the view or picturecarrying bracket. Fig. 7 is a perspective view of the lens casingshowing the movable parts designed to be connected thereto removed.

The present invention has relation to aview changing device for magiclanterns and it consists in the novel arrangement hereinafter describedand particularly pointed out in the claims.

Similar characters of reference indicate corresponding parts in all thefigures of the drawing.

In the accompanying drawing, 1 represents the lens case or frame, whichis constructed in the ordinary manner and is provided with the usualdevices employed in stereo ticon apparatus, but the case within itself'orms no particular part of the present invention. To the lens case orframe 1 is connected the plate 2, which plate is extended forward of thelens 3" any desired distance, and may be of the form shown or it may beof any other desired form as the ob jects and purposes hereinafterdescribed can be carried out without any reference to the shape of theplate 2. Through the plate 2 extends the rock shaft 3, which rock shaftis provided at its bottom or lower end with the handle 4. Upon the rockshaft 3 is located the sleeve 5,the bottom or lower end of which restsupon the plate 2, and upon the top or upper end of the sleeve 5 islocated the bottom or lower end of the hub 6, which hub is preferablyformed integral with the bar 7 or its equivalent. To the bar 7 isattached the disk 8, to which disk are attached the shutter blades 9,which shutter blades are located parallel with each other and are spacedfrom each other a distance equal or practically equal to the Width ofthe lens opening 10 formed in front of the lens 3*.

While I have illustrated the shutter blades 9 as connected to thecircular disks 8, this is simply conventional inasmuch as the partcarrying the shutter blades need not necessarily be of any specificconstruction, but of such construction that it will support in properrelationship and position the shutter lades 9.

U on the plate 2 is located the skeleton brac et 11, which skeletonbracket is provided with the picture carrying bars 12, which are groovedfor the purpose of holding the picture in proper position when placedinto position to be brought in front of the lens 3 To the bottom orunderside of the bar 7 or its equivalent is attached the pin 13, whichpin is for the purpose of engaging the skeleton bracket. When it isdesired to shift a picture the handle 4 is moved in the desireddirection, which in turn moves the bar 7 together with the shutterblades 9 and when the pin 13 engages the skeleton bracket at the points14, said pin will carry said skeleton bracket with the handle 4, but nomovement of the bracket 11 will take place until the pin engages one ofthe points 14, but during the time the pin is moving toward either ofthe points 14, the shutter blades 9 will move to or assume the positionillustrated in Fig. 1, by which arrangement the entire light is cut 01f.But before the skeleton bracket has been moved by the pin 13 so as tobring a picture into full view it will be thrown to one side of itspivotal point, at which time the spring 15 automatically moves theskeleton bracket into full position and the bracket is stopped by reasonof coming in contact with the sleeve 5 or its equivalent, the bracketbeing provided with the recesses 17 and for the purpose of bringing thespring into position to actuate the skeleton bracket, the rock bar 18 isprovided which rock bar is actuated by the pin 19, which pin is securedto the skeleton bracket 11, a short distance in front of its pivotalpoint 11. The rock barl18, is

formed with a slot through which thepin 19, passes, and said rock bar ispivotally mounted on the post 21.

It will be understood that the rock bar 18 will be rocked in theopposite direction from the skeleton bracket so as to throw the front orforward end of the rock bar 18 into position to bring the spring 15 intoposition to automatically rock the skeleton bracket, said 7 spring beingattached at its forward end to the pin 23 or its equivalent. By thispeculiar arrangement the picturedesired to be thrown upon a canvas willbe brought into position prior to the time the shutter blades are roughtinto position to throw the picture and in order to bring the'pictureinto view the handle is carried in the direction to bring the shutterblades into the position illustrated in dotted lines Fig. 2, which istheir position during the time a picture is being thrown upon thecanvas. By providing the two shutter blades and s acing them from eachother a distance equa or substantially equal to the width of the openingin front of the lens both blades are utilized in closing the opening;thereby greatly reducing the movement ofthe shutter blades in fullyclosing and opening the openingin front of the lens. By providing theskeleton bracket, and connecting the spring 15 to the lip 23, which lipis connected to or formed integral with the skeleton bracket, saidspring will automatically bring the skeleton bracket to pro eradjustment and hold said skeleton brac :et in such a manner that thepicture carried by the bracket and to be located in front of the lensopening will not be moved nor will there be any vibration or tremblingof the picture during the time the shutter blades are being opened.

It will be understood that when a picture is being withdrawn from infront of the lens the shutter blades will be first brought into positionto cut off the light before there is any movement of the icture and thelight will remain cut off until the picture designed to be thrown uponthe canvas is set and held in position, after which the light is thrownupon the canvas without any movement of the picture.

For the purpose of stopping the shutter blades in their opened positionthe stop pins 24 are provided, which stop ins are located upon thebottom or undersic e of the plate 2 or the disk 25 as desired. For thepurpose of holding the handle 4 together with the different partsoperated by the handle said handle is provided with the spring 26, whichspring presses against the underside of the disk 25. i

It will be understood that by roviding two shutter blades and spacing tem from each other that the entire light can be cut off at any timeindependent of the movement of the picture carrier. This result isaccomplished by substantially one half the movement required where asingle blade is employed; by which arrangement I am enabled to cutoffthe entire light without disturbing the fixed position of the picture. Iam also enabled to throw the full picture upon the canvas at any timeduring the time the picture is in position by a slight movement of thehandle, thereby greatly reducing the time in manipulating the shutterblades, which is of great importance in the proper manipulation of magiclantern views. I am also enabled to almost instantaneously bring a newlyset picture into view and to instantaneously cut the picture from thecanvas.

It will be understood that in cutting off the picture from view by useof the spaced shutter blades the opening is closed toward its center andit is only necessary to move each shutter blade a distance equal toonehalf of the lens aperture or in other words it is only necessary tointerpose one-half the surface of each blade between the canvas and thelens opening.

Having fully described my invention what I claim as new and desire tosecure by Letters Patent, is i 1. In a view changing device formagiclanterns, a lens-frame, shutter blades held in fixed relativespaced position from each other, a movable support for said shutterblades, a picture carrying bracket adapted to move with the movingsupport of the picture blades and adapted to move independent of theshutter blade support and shutter blades and means carried by theshutter blade support to move the icture carrying bracket, substantiallyas ancFfor the purpose specified.

2. In a view changing device for magic lanterns, a lens frame, shutterblades held in fixed relative spaced position from each other, a movablesupport for said shutter blades, a picture carrying bracket adapted tomove in the path of the shutter blades and with said shutter bladesindependent of the movement of the shutter blades and means carried bythe shutter blade support to move the picture carrying bracket,substantially as and for the purpose specified.

3. In a view changing device for magic lanterns, a frame and a lenstherefor, shutter blades spaced from each other and means for supportingsaid shutter blades, a picture carrying bracket, said bracket andshutter blades adapted to move in the same plane, the picture carryingbracket having simultaneous movement with the movement of the shutterblades and a further independent movement of the shutter blades,substantially as and for the purpose specified.

4. In a view changing device for ma ic lanterns, a lens frame carrying alens and a lens opening therefor, a plate extended forward of the lensopening, spaced shutter blades, a rock shaft adapted to support theshutter blades, stops adapted to limit the movement of the shutterblades, said shutter blades operatively attached to the rock shaft, apicture carrying bracket located upon the plate forward of the lensopening, a rock bar pivotally connected to the late, a spring connectedto the said rock liar and to the picture carrying bracket, substantiallyas and for the purpose specified.

5. In a view changing device for magic lanterns, a lens frame carrying alens and a lens opening therefor, a plate extended forward of the lensopening, a rock shaft j ournaled in said plate and provided with ahandle, stops ada ted to limit the movement of the hand e, shutterblades spaced from each other and a support for said shutter blades, apicture carrying bracket movable upon the plate and in the same plane asthe shutter blades, a rock-bar pivotally mounted upon the plate carryingthe picture carrying bracket adapted to be actuated for a portion of itsmovement by means carried by the shutter blade support and a springadapted to actuate the rock bar, substantially as and for the purposespecified.

In testimony that I claim the above, I have hereunto subscribed my namein the presence of two Witnesses.

JEREMIAH KELLER. Witnesses:

J. A. JEFFERS, F. W. BOND.

